A Reconfigurable Diode Topology for Wireless Power Transfer With a Wide Power Range

This letter presents a reconfigurable diode topology which obtains the independently tuned ultra-low threshold voltage and large breakdown voltage simultaneously. Measured I-V curves show that the proposed topology obtains both ultra-low threshold voltage (250 mV) and tunable breakdown voltage up to -51 V. By applying the topology in rectifier design, high efficiency of above 50% can be maintained within a wide power range from 0.1 W to above 10 W in an inductive wireless power transfer (WPT) test environment. It provides a practical diode topology design for rectifiers to maintain high efficiency for large power variation scenarios such as coil misalignment.